Andy, I'm confused by your last sentence. Is that possible, to simultaneously have the main battery feeding the left ignition and the backup battery...
The best way to get the ARINC and RS-232 bus configurations is to ask for a screen capture of the configuration pages. When I created the schematics...
Thanks for the feedback - I have used some of those files but there are some discrepancies where my wiring is not identical and the biggest issue is...